Hanging arch for furnaces



April 27,1926. 1,582,275

G. A. KELLNER 5 I HANGING ARCH FOR FURNACES Filed August 6, 1924 3 Sheebs-Shet 1 anucmtoz I N N April 27 1926.

G. A. KELLNER HANGING ARCH FOR FURNACES Filed August 6, 1924 3 Sheets-Sheet 2 Lii/ atrounif A ril 27, 1926. 1,582,275 G. A. KELLNER HANGING ARCH FOR. FURNACES File d August- 6, 1924 5 Sheats-Shet 5 v l e/ker; L MZhM Patented Apr. 27, 1926.

PATENT OFFICE.

GEORGE A. KELLNER, OI DETROIT, MICHIGAN.

HANGING ARCH FOR FURNACES.

Application flied August 8, 1924. Serial No. 780,863.

the following is a specification.

My invention relates to hanging arches such as are used in the construction of furnaces where a high degree of heat is employed, necessitating a loose construction in order to allow for heat expansion. As heretofore constructed hanging arches'for this purpose were diflicult to repair. If a brick in the arch should become broken from heat expansion or other causes, often substantially the entire arch would have to be removed to replace the broken brick or bricks and there was also danger of a large part of the arch falling.

The object of my invention is to provide a hanging arch in which the bricks are of such shape and supported in such manner that any one of them may be removed without disturbing the arch except the bricks immediately adjacent to the one to be removed.

This affords great economy in time and labor in making repairs as well as greatly lessening the time the arch must be out of service for the purpose of repair. Furthermore, if one or more of the bricks are broken or injured the arch can not fall because the remaining bricks are independently supported.

With these and other objects in view I will now describe the means by which these objects are attained, referring to the drawings forming a part of my specification and using reference numerals to indicate the several parts.

1, is a section of a furnace-showing my hanging arch applied thereto.

Fig. 2 is a cross-section of the furnace on the line 2* x of Fig. 1.

Fig. 3, is a bottom plan view of my arch.

Fig. 4 is a perspective view showing my bricks laid in staggered relation and hangers by which they are secured to a T beam.

Fig. 5, is a perspective view of one form of bricks to be used and showing a recess for securing a T bolt to support the bricks.

Fig. 6, is a perspective view of the same form of brick but without the recess and resting on its narrowest face in which relation it is to be set in the arch.

Fig. 7, is a perspective view of another form of brick which is to be used in the curved portion of the arch, having a recess, and with its upper and lower faces curved to conform to the curvature of the arch.

In the accompanying drawings, 1 indicates the fire-box of a furnace which may be of any type commonly in use, and having sidewalls 2. Secured to one side-wall is a plate 3, upon which is set I beams 4 and 5. Beneath the plate 3 is mounted a T beam, 6, which is secured to the plate 3 and the I beam. 4 bv means of a bolt 7 which passes through the T beam, the plate and the foot of the I beam 4, the upper end of the bolt being threaded to receive a nut. The opposite end of the T beam is secured by means of bolts and nuts to the Ibeam 8 which rests upon the opposite wall of the furnace. A lanes of such T beams are similarly constructed and supported, the number necessary depending upon the size of the arch to be erected. A series of these T beams thus form the support to which the arch bricks are secured as shown in Figs. 3 and 4.

Three kinds of bricks are used in constructing my arch and are shown in Figs. 5, 6 and 7. The brick 9, shown in Fig. 5 is provided with a recess 10 at one end and is adapted to receive one end of the T bolt 11. This brick is made in the form of a wedge or keystone and has a narrow face 12 and a broad face 13. Like most keystones the narrowest of its several faces is the upper face when set in the arch and the opposite face is, relative thereto, a broad face. Fig. 6 shows a brick of the same shape but without the recess and this brick I will designate as 14 and is intended to be set with its narrowest face down while the bricks 9 are to be set with their narrowest faces up as shown in Fig. 4. By up and down as used in this specification is meant in the direction of the T beam for up and the opposite direction down and the line of direction would therefore follow the center line of the T bolt and hangerbar as shown in Fig. 1. Fig. 7 shows the form of brick to be used in the curved portion of the arch and is recessed to receive the end of the T bolt 11. This brick is provided with a curved upper and lower face and should be made of such dimensions as to properly fill the space of the curve. A hanger-bar 15 is threaded at one end and is adapted to be passed through holes bored in the T beam and secured thereto with a nut 16. The hanger bars preferably. have eyes at the lower ends and the T-bolts are provided with hooks at the upper ends of their shanks adapted to engage the eyes of the ha er bars thus forming an adjustable and flexi le support for the bricks. By tightening or loosening this nut the bar may be raised or lowered thus raising or lowering the bricks which the bars support, when con nected to the T bolts. The means described for supporting the bricks is employed for the purpose of securing easy access tothe bricks for their removal, to enable the bricks to be readily adjusted toward or from the support so as to permit an even arrangement of the bricks notwithstanding irregularities in size and shape of the bricks and in the shape of the supporting I-beaans, or other variations which,may arise from irregularities in the wall itself. By reason of the flexibility of the connection the arch is relieved of shocks incident to vibrations which occur in installations of this character. The distance between the T beams and the top of the arch floor is determined by the length of the hanger-bar and T bolt and should be such as to permit a working space in which to remove a brick from beneath the T beam by lifting it in the direction of the T beam and sliding it out over the adjacent bricks.

A convenient method of constructing an arch of this character would be to first secure the hanger-bars to the T beams in that portion of the arch which lies in a horizontal plane, then place two of the bricks, 9, on a T bolt and hang them on the hanger-bars and repeat this operation until the several rows of bricks 9 are set in place. After the bricks 9 have been placed it is a simple matter to insert between each row in the remaining space a sufficient number of the bricks 14, with their narrowest faces down, to complete the level portion of the floor of the arch. The curve of the arch may then be constructed in a similar manner, but with two rows of the bricks 9 in juxtaposition as .shown in Fig. 1. It is apparent from this construction that the bricks 14 will be supported by their contact with the walls of the bricks 9. The bricks 14 should be laid with broken joints or in staggered relation to the bricks 9 as shown in Fig. '4. This staggered relation is advantageous when it is desired to remove a brick for repairs. If it is desired to remove a brick 14 it may be simply lifted from between the adjacent bricks, but if it is desired to remove a brick 9 it is necessary to first remove three of the bricks 14, then uncouple the brick 9 from its hanger-bar and lift out the two bricks connected to the T bolt. When it is desired to replace the bricks thus removed the order of procedure is reversed and the bricks 9 are first inserted and coupled to the hanger-bar as before.

In constructing the curved portion of the arch it is apparent that it is desirable to curve the inner and outer surface of the bricks to present a uniform curve in the arch when completed. Since the outer circle is of greater length than the inner circle, I lay two rows 0 bricks of the form shown in Fig. 7 in juxtaposition as shown in Fig. 1, and ,connect each to the T beam with a T bolt and hanger-bar, then insert between each double row a series of similar bricks with their narrowest faces down.

In furnaces of this type the fuel is usually fedhthrough a chute 17 extended through the arc 'Having described my invention and its mode of operation, what I claim is:

1. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted relation to each other, and depending means connected to the supports and to a plurality of the bricks for susupending the arch from and beneath said supports.

2. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted relation to each other, and flexible depending means connected to the supports and to a plurality of the bricks for suspending the arch from and beneath said supports.

3. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted relation to each other, and depending means adjustably connected to the supports and to a plurality of the bricks for suspending the arch from and beneath said supports.

4. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted relation to each other, and depending means connected to the supports and to a plurality of the bricks for suspending the arch from and beneath said supports at a sufficient distance from the supports to enable removal of bricks from the arch in the intervening space.

5. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted relation to each other, T-bolts detachably connected to bricks of alternate courses,'and hanger bars depending from the supports and flexibly connected to the upper ends of the shanks of the T-bolts.

6. In a hanging arch, supports extending over and across the fire box, a series of keystone bricks arranged in courses in inverted ma ma Q relation to each other, T-bolts detachably connected to bricks of alternate courses, and

connected to bricks of alternate courses, and hanger bars depending from the supports 0 hanger bars adjust-ably connected to the supand flexibly and detachably connected to the ports and depending therefrom. up er ends of the shanks of the T-bolts.

7. In a hanging arch, supports extending igned at the city of Detroit, county of over and across the fire box, a series of key- Wayne, State of Michigan, this 2nd day of stone bricks arranged in courses in inverted Aug. 1924. relation to each other, T-bolts detachably GEORGE A. KELLNER. 

